包含var sceneData代码的行给出了一个错误,显然是因为“path”字符串.有谁知道如何解决这个问题？谢谢！
extension SKNode {
class func unarchiveFromFile(_ file : String) -> SKNode? {
if let path = Bundle.main.path(forResource: file,ofType: "sks") {
var sceneData = Data(bytesNoCopy: path,count: .DataReadingMappedIfSafe,deallocator: nil)!
var archiver = NSKeyedUnarchiver(forReadingWithData: sceneData)
archiver.setClass(self.classForKeyedUnarchiver(),forClassName: "SKScene")
let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as! GameScene
archiver.finishDecoding()
return scene
} else {
return nil
}
}
}
解决方法
数据(bytesNoCopy：期望指针而不是字符串路径.
从磁盘读取数据的API是Data(contentsOf,但是需要URL
extension SKNode {
class func unarchiveFromFile(_ file : String) -> SKNode? {
if let url = Bundle.main.url(forResource: file,withExtension: "sks") {
do {
var sceneData = try Data(contentsOf: url)
var archiver = NSKeyedUnarchiver(forReadingWith: sceneData)
archiver.setClass(self.classForKeyedUnarchiver(),forClassName: "SKScene")
let scene = archiver.decodeObjectForKey(NSKeyedArchiveRootObjectKey) as! GameScene
archiver.finishDecoding()
return scene
} catch {
return nil
}
} else {
return nil
}
}
}
class func unarchive(from file : String) -> SKNode? { ...